L2Chttps://www.coulomb.univ-montp2.fr/
frSPIP - www.spip.net, AIGLe - aigle.sf.net
[ Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)http://www.coulomb.univ-montp2.fr/plugins/kitcnrs-5.3/images/logo_small_l2c.jpghttps://www.coulomb.univ-montp2.fr/
3177
]
#physique - Seminar of POCHET Pascal: To be announced https://www.coulomb.univ-montp2.fr/?page=seminaires&id_seminar=799&details=1
2017-11-07T09:18:21Z2017-11-07T09:18:21Ztext/htmlfrPOCHET Pascal#physique - Seminar of WAKAMURA Taro: Title : Strong Anisotropic Spin-Orbit Interaction Induced in Graphene by Monolayer WS2 https://www.coulomb.univ-montp2.fr/?page=seminaires&id_seminar=810&details=1
2017-12-12T11:31:09Z2017-12-12T11:31:09Ztext/htmlfrWAKAMURA TaroIn this talk we show strong SOI in graphene induced by monolayer WS2. Direct comparison between graphene/monolayer WS2 and graphene/bulk WS2 system in magnetotransport measurements reveals that monolayer transition metal dichalcogenide (TMD) can induce much stronger SOI than bulk. Detailed theoretical analysis of the weak-antilocalization curves gives an estimated spin-orbit energy (Eso) more than 10 meV. We find that z → − z symmetric SOI is stronger than asymmetric one, indicating that strong Kane-Mele (KM) or valley-Zeeman (VZ) type SOI is induced in graphene. Dominant Elliot-Yafet spin relaxation mechanism and dramatic increase of resistance around the Dirac point with temperature are suggestive for existence of larger KM SOI than VZ one.#physique - Seminar of METZGER Bloen: Revealing the frictional transition in shear thickening suspensions https://www.coulomb.univ-montp2.fr/?page=seminaires&id_seminar=809&details=1
2017-12-07T13:35:06Z2017-12-07T13:35:06Ztext/htmlfrMETZGER Bloen(ART) Gene length as a regulator for ribosome recruitment and protein synthesis: theoretical insightshttps://www.coulomb.univ-montp2.fr/?page=publications&ref_preprint=L2C:17-099&details=1
2017-12-11T23:00:00Z2017-12-11T23:00:00Ztext/htmlfrProtein synthesis rates are determined, at the translational level, by properties of the transcript's sequence. The efficiency of an mRNA can be tuned by varying the ribosome binding sites controlling the recruitment of the ribosomes, or the codon usage establishing the speed of protein elongation.In this work we propose transcript length as a further key determinant of translation efficiency. Based on a physical model that considers the kinetics of ribosomes advancing on the mRNA and diffusing in its surrounding, as well as mRNA circularisation and ribosome drop-off, we explain how the transcript length may play a central role in establishing ribosome recruitment and the overall translation rate of an mRNA. According to our results, the proximity of the 3' end to the ribosomal recruitment site of the mRNA could induce a feedback in the translation process that would favour the recycling of ribosomes.We also demonstrate how this process may be involved in shaping the experimental ribosome density-gene length dependence. Finally, we argue that cells could exploit this mechanism to adjust and balance the usage of its ribosomal resources.(ART) Density controls the kinetic stability of ultrastable glasseshttps://www.coulomb.univ-montp2.fr/?page=publications&ref_preprint=L2C:17-171&details=1
2017-12-06T23:00:00Z2017-12-06T23:00:00Ztext/htmlfrWe use a swap Monte Carlo algorithm to numerically prepare bulk glasses with kinetic stability comparable to that of glass films produced experimentally by physical vapor deposition. By melting these systems into the liquid state, we show that some of our glasses retain their amorphous structures longer than 10^5 times the equilibrium structural relaxation time. This exceptional kinetic stability cannot be achieved experimentally for bulk materials. We perform simulations at both constant volume and constant pressure to demonstrate that the density mismatch between the ultrastable glass and the equilibrium liquid accounts for a major part of the observed kinetic stability.(ART) Methods to locate saddle points in complex landscapeshttps://www.coulomb.univ-montp2.fr/?page=publications&ref_preprint=L2C:17-170&details=1
2017-12-05T23:00:00Z2017-12-05T23:00:00Ztext/htmlfr.Polariton condensates in GaN and ZnO microcavitieshttps://www.coulomb.univ-montp2.fr/Polariton-condensates-in-GaN-and-ZnO-microcavities
https://www.coulomb.univ-montp2.fr/Polariton-condensates-in-GaN-and-ZnO-microcavities2017-12-13T12:16:00Ztext/htmlfrPEPS
<p>Polariton condensates in microcavities form a model system for the realization and control of collective quantum states, inspired from atomic condensates. GaN and ZnO are semiconducting materials with strong excitons, in terms of binding energy and oscillator strength. They are therefore especially interesting for the generation and control of polariton condensates, that we study at room temperature. Here is a review, written in 2016, of this research field . <br class='autobr' />
The realization of high (...)</p>
-
<a href="https://www.coulomb.univ-montp2.fr/-Physics-of-microcavities-spin-dynamics-polariton-condensates-and-lasers-" rel="directory">Physics of microcavities : spin dynamics, polariton condensates and lasers</a>
Transport of indirect excitons in wide-bandgap semiconductor quantum wellshttps://www.coulomb.univ-montp2.fr/Transport-of-indirect-excitons-in-wide-bandgap-semiconductor-quantum-wells
https://www.coulomb.univ-montp2.fr/Transport-of-indirect-excitons-in-wide-bandgap-semiconductor-quantum-wells2017-12-13T12:02:37Ztext/htmlfrPEPS
<p>Excitons in polar group-III nitride quantum wells (QWs) are naturally indirect, because electron and hole within such excitons are spatially separated. As a consequence, they have strong dipole moments and long radiative lifetimes. Extensive studies of indirect excitons (IXs) in GaAs-based heterostructures have shown, that a combination of these two features results in many interesting properties of IXs : they can propagate over large distances, can be controlled in-situ by light and (...)</p>
-
<a href="https://www.coulomb.univ-montp2.fr/-Indirect-excitons-" rel="directory">Excitons indirects</a>
Nonlinear optical spectroscopy of indirect excitons in coupled quantum wellshttps://www.coulomb.univ-montp2.fr/Nonlinear-optical-spectroscopy-of-indirect-excitons-in-coupled-quantum-wells
https://www.coulomb.univ-montp2.fr/Nonlinear-optical-spectroscopy-of-indirect-excitons-in-coupled-quantum-wells2017-12-13T10:49:24Ztext/htmlfrPEPS
<p>Indirect excitons in coupled quantum wells are long-living quasiparticles, explored in the studies of collective quantum states. We demonstrate that, despite the extremely low oscillator strength, their spin and population dynamics can by addressed by time-resolved pump-probe spectroscopy. Our experiments make it possible to unravel and compare spin dynamics of direct excitons, indirect excitons, and residual free electrons in coupled quantum wells. Measured spin relaxation time of indirect (...)</p>
-
<a href="https://www.coulomb.univ-montp2.fr/-Indirect-excitons-" rel="directory">Excitons indirects</a>
Influence of magnetic quantum confined Stark effect on the spin lifetime of indirect excitonshttps://www.coulomb.univ-montp2.fr/Influence-of-magnetic-quantum-confined-Stark-effect-on-the-spin-lifetime-of
https://www.coulomb.univ-montp2.fr/Influence-of-magnetic-quantum-confined-Stark-effect-on-the-spin-lifetime-of2017-12-13T10:49:06Ztext/htmlfrPEPS
<p>We observed an unusual and counter-intuitive behaviour of spin lifetime of excitons in coupled semiconductor quantum wells (CQWs) in the presence of in-plane magnetic field. Instead of conventional acceleration of spin relaxation due to the Larmor precession of electron and hole spins we observe a strong increase of the spin relaxation time at low magnetic fields followed by saturation and decrease at higher fields. We argue that this non-monotonic spin relaxation dynamics is a fingerprint (...)</p>
-
<a href="https://www.coulomb.univ-montp2.fr/-Indirect-excitons-" rel="directory">Excitons indirects</a>
Congress/Workshop from 2017-12-15 to 2017-12-15: Cosmology & High Energy Physics IIIhttps://www.coulomb.univ-montp2.fr/Cosmology-High-Energy-Physics-III]
1970-01-01T00:00:00Z1970-01-01T00:00:00ZfrCongress/Workshop from 2018-01-15 to 2018-01-17: Polymères et Océans 2018https://po2018.wixsite.com/po2018]
1970-01-01T00:00:00Z1970-01-01T00:00:00ZfrCongress/Workshop from 2018-03-16 to 2018-03-17: International Conference on BioMedical Photonicshttp://www.biomedicalphotonics.org/]
1970-01-01T00:00:00Z1970-01-01T00:00:00Zfr